Knife for filleting fish



FIG. 1 is a top plan view of a knife for filleting fish showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end view thereof; and

FIG. 5 is a right end view thereof. 

The ornamental design for a knife for filleting fish, substantially as shown. 